scandit-sdk/rollup.config.js

// rollup.min-config.js
import os from "os";
import path from "path";

import autoprefixer from "autoprefixer";
import babel from "rollup-plugin-babel";
import commonjs from "rollup-plugin-commonjs";
import cssnano from "cssnano";
import nodeResolve from "rollup-plugin-node-resolve";
import nodeSass from "node-sass";
import postcss from "postcss";
import filesize from "rollup-plugin-filesize";
import sass from "rollup-plugin-sass";
import sizes from "rollup-plugin-sizes";
import sourcemaps from "rollup-plugin-sourcemaps";
import { terser } from "rollup-plugin-terser";
import typescript from "rollup-plugin-typescript2";
import visualizer from "rollup-plugin-visualizer";

import { version } from "./package.json";

const config = {
  input: "src/index.ts",
  output: {
    sourcemap: true,
    banner: `/*!
 * @license
 *
 * Scandit Barcode Scanner SDK for the Web
 * v. ${version}
 *
 * Copyright © 2019 Scandit AG. All Rights Reserved.
 *
 * The use of this software is governed by the Scandit Terms and Conditions.
 * https://ssl.scandit.com/terms/test.pdf
 *
 * The following sets forth attribution notices for third party software that may be contained in portions of the product.
 * https://docs.scandit.com/stable/web/LICENSE
 */`
  },
  plugins: [
    nodeResolve({
      mainFields: ["module", "main", "browser"]
    }),
    commonjs({
      namedExports: {
        "node_modules/eventemitter3/index.js": ["EventEmitter"]
      }
    }),
    sass({
      insert: true,
      runtime: nodeSass,
      processor: css => {
        return postcss([autoprefixer, cssnano])
          .process(css, {
            from: undefined
          })
          .then(result => {
            return result.css;
          });
      }
    }),
    typescript({
      tsconfig: "./tsconfig.module.json",
      typescript: require("typescript"),
      cacheRoot: "./node_modules/.cache/.rts2_cache/" + process.env.CACHE_FOLDER,
      useTsconfigDeclarationDir: true,
      clean: process.env.ROLLUP_MODE === "size-info",
      objectHashIgnoreUnknownHack: process.env.ROLLUP_MODE === "size-info"
    }),
    babel({
      extensions: [".js", ".jsx", ".ts", ".tsx"],
      presets: [
        [
          "@babel/preset-env",
          {
            modules: false
          }
        ]
      ],
      plugins: [
        [
          "@babel/plugin-transform-runtime",
          {
            corejs: 2
          }
        ]
      ],
      overrides: [
        {
          test: "**/engineWorker.ts",
          presets: [
            [
              "@babel/preset-env",
              {
                targets: {
                  browsers: [
                    "Chrome >= 57",
                    "ChromeAndroid >= 59",
                    "Firefox >= 52",
                    "FirefoxAndroid >= 55",
                    "Opera >= 44",
                    "OperaMobile >= 46",
                    "Safari >= 11",
                    "iOS >= 11",
                    "Edge >= 16",
                    "Samsung >= 7"
                  ]
                },
                modules: false,
                include: [
                  "transform-template-literals",
                  "transform-function-name",
                  "transform-arrow-functions",
                  "transform-parameters"
                ],
                exclude: ["transform-typeof-symbol", "transform-for-of"]
              }
            ]
          ],
          plugins: [
            [
              "@babel/plugin-transform-runtime",
              {
                corejs: false,
                helpers: false,
                regenerator: false
              }
            ]
          ]
        }
      ],
      babelrc: false,
      runtimeHelpers: true,
      exclude: "node_modules/**"
    })
  ],
  onwarn: function(message) {
    if (/Circular dependency:/.test(message)) {
      return;
    }
    if (/The "ongenerate" hook used by plugin rollup-plugin-sizes is deprecated./.test(message)) {
      return;
    }
    if (/The \'this\' keyword is equivalent to \'undefined\' at the top level of an ES module/.test(message)) {
      return;
    }
    console.error(message);
  }
};

if (process.env.ROLLUP_MODE === "size-info") {
  config.plugins.push(sizes());
  config.plugins.push(filesize());
  config.plugins.push(
    visualizer({
      filename: path.join(os.tmpdir(), "size-info.html"),
      open: true,
      title: "WebSDK Bundle Size",
      template: "sunburst"
    })
  );
}

if (process.env.ROLLUP_MODE === "minify") {
  config.plugins.push(
    terser({
      warnings: true,
      output: {
        comments: /Scandit Barcode Scanner SDK for the Web/i
      },
      compress: {
        passes: 3
      }
    })
  );
  config.plugins.push(sourcemaps());
} else {
  config.plugins.push(sourcemaps());
}

export default config;